What is the correct usage of the overhead oxygen masks?

The correct usage of the overhead oxygen masks is to remove them from the overhead compartment and place them over the face. This is the standard procedure in case of decompression or other emergencies in which supplemental oxygen is needed. The masks are designed to provide passengers with oxygen to ensure they can breathe adequately while the cabin pressure is restored or during emergencies.

When the oxygen masks drop down, the first step is to position the mask over the nose and mouth, securing it in place with the elastic band. This allows for immediate access to oxygen, which is critical in emergencies where hypoxia (lack of oxygen) could occur. The other choices do not accurately reflect the proper procedures associated with the use of the overhead oxygen masks.

For example, hooking the mask to a life jacket is not a procedure associated with their use. Masks are intended to be used independently and do not require any connection to life vests. Prior medical clearance is also unnecessary for passengers, as the masks are designed for general use under emergency conditions. Lastly, oxygen masks are available not just in emergency landings, but also during any situation where cabin pressure is compromised, making them essential safety equipment throughout the flight.